Reduction in Cuts Speed at the Beginning of a Sorting Sidings, Equipped With Quasi-Continuous Speed Control System

Abstract

Purpose. Clear and uninterrupted operation of humps depends on the quality of technical equipment and control technology of cuts speed. Technology of interval and purposive regulation of cuts speed is used at most humps. The article discusses ways to reduce the cuts rolling speed to a safe level at the beginning of the sorting sidings equipped with quasi-continuous speed control system. Methodology. It proposed three fundamentally different ways to reduce the cuts rolling speed at the beginning of the sorting sidings. The analysis of the ways to reduce cuts rolling speed to a safe level at the beginning of the sorting sidings was conducted using simulation the process of cuts rolling from humps equipped with quasi-continuous speed control. Findings. As a result of analysis, the inappropriateness of opposite elevation using on the roll-out part of the hump after the last separation switch point was established. Point regulators of cars speed can be used to reduce the cuts rolling speed at the beginning of the sorting sidings, but this leads to a division conditions deterioration on the last separating switch points of long cuts with the following after them short cuts. Reducing the cuts rolling speed at the beginning of the sorting sidings can be carried out using the beam retarders on the stationary park retarder position. Control algorithm of park retarder position is quite simple. All cuts should be released from it with a safe speed. If the implementation accuracy of the given speed when release of cuts from the park retarder position is low, it is possible to eliminate the error with point regulators of cars speed. Originality. The author has detected a contradictory relationship between the quality indicators of cuts division on the separation switch points of hump lowering section and loading quality of sorting sidings with cars in conditions of equipping the humps by quasi-continuous speed control system of cuts speed. Practical value. Results of the study can be used in case of equipping the hump with quasi-continuous speed control system of cuts speed.

Influence of opposite elevation on the occupancy level of the tracks of sorting park

“…In addition to the longitudinal profile, the park braking position also has a great influence on the sorting track occupancy level. In study [18], the author identifies a method for reducing the exit speed of a cut into the park using beam retarders as the most effective method. In case if the accuracy of exit speed is not sufficient, the use of point retarders with beam ones is recommended.…”